traefik/vendor/github.com/xenolf/lego/providers/dns/cloudflare/cloudflare.go

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// Package cloudflare implements a DNS provider for solving the DNS-01 challenge using cloudflare DNS.
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package cloudflare
import (
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"errors"
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"fmt"
"net/http"
"time"
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"github.com/cloudflare/cloudflare-go"
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"github.com/xenolf/lego/challenge/dns01"
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"github.com/xenolf/lego/log"
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"github.com/xenolf/lego/platform/config/env"
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)
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const (
minTTL = 120
)
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// Config is used to configure the creation of the DNSProvider
type Config struct {
AuthEmail string
AuthKey string
TTL int
PropagationTimeout time.Duration
PollingInterval time.Duration
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider
func NewDefaultConfig() *Config {
return &Config{
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TTL: env.GetOrDefaultInt("CLOUDFLARE_TTL", minTTL),
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PropagationTimeout: env.GetOrDefaultSecond("CLOUDFLARE_PROPAGATION_TIMEOUT", 2*time.Minute),
PollingInterval: env.GetOrDefaultSecond("CLOUDFLARE_POLLING_INTERVAL", 2*time.Second),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond("CLOUDFLARE_HTTP_TIMEOUT", 30*time.Second),
},
}
}
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// DNSProvider is an implementation of the acme.ChallengeProvider interface
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type DNSProvider struct {
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client *cloudflare.API
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config *Config
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}
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// NewDNSProvider returns a DNSProvider instance configured for Cloudflare.
// Credentials must be passed in the environment variables:
// CLOUDFLARE_EMAIL and CLOUDFLARE_API_KEY.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.GetWithFallback(
[]string{"CLOUDFLARE_EMAIL", "CF_API_EMAIL"},
[]string{"CLOUDFLARE_API_KEY", "CF_API_KEY"})
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if err != nil {
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return nil, fmt.Errorf("cloudflare: %v", err)
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}
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config := NewDefaultConfig()
config.AuthEmail = values["CLOUDFLARE_EMAIL"]
config.AuthKey = values["CLOUDFLARE_API_KEY"]
return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for Cloudflare.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("cloudflare: the configuration of the DNS provider is nil")
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}
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if config.TTL < minTTL {
return nil, fmt.Errorf("cloudflare: invalid TTL, TTL (%d) must be greater than %d", config.TTL, minTTL)
}
client, err := cloudflare.New(config.AuthKey, config.AuthEmail, cloudflare.HTTPClient(config.HTTPClient))
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if err != nil {
return nil, err
}
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return &DNSProvider{client: client, config: config}, nil
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}
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// Timeout returns the timeout and interval to use when checking for DNS propagation.
// Adjusting here to cope with spikes in propagation times.
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func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
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return d.config.PropagationTimeout, d.config.PollingInterval
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}
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// Present creates a TXT record to fulfill the dns-01 challenge
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func (d *DNSProvider) Present(domain, token, keyAuth string) error {
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fqdn, value := dns01.GetRecord(domain, keyAuth)
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authZone, err := dns01.FindZoneByFqdn(fqdn)
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if err != nil {
return fmt.Errorf("cloudflare: %v", err)
}
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zoneID, err := d.client.ZoneIDByName(dns01.UnFqdn(authZone))
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if err != nil {
return fmt.Errorf("cloudflare: failed to find zone %s: %v", authZone, err)
}
dnsRecord := cloudflare.DNSRecord{
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Type: "TXT",
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Name: dns01.UnFqdn(fqdn),
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Content: value,
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TTL: d.config.TTL,
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}
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response, err := d.client.CreateDNSRecord(zoneID, dnsRecord)
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if err != nil {
return fmt.Errorf("cloudflare: failed to create TXT record: %v", err)
}
if !response.Success {
return fmt.Errorf("cloudflare: failed to create TXT record: %+v %+v", response.Errors, response.Messages)
}
log.Infof("cloudflare: new record for %s, ID %s", domain, response.Result.ID)
return nil
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}
// CleanUp removes the TXT record matching the specified parameters
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func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, _ := dns01.GetRecord(domain, keyAuth)
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authZone, err := dns01.FindZoneByFqdn(fqdn)
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if err != nil {
return fmt.Errorf("cloudflare: %v", err)
}
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zoneID, err := d.client.ZoneIDByName(dns01.UnFqdn(authZone))
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if err != nil {
return fmt.Errorf("cloudflare: failed to find zone %s: %v", authZone, err)
}
dnsRecord := cloudflare.DNSRecord{
Type: "TXT",
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Name: dns01.UnFqdn(fqdn),
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}
records, err := d.client.DNSRecords(zoneID, dnsRecord)
if err != nil {
return fmt.Errorf("cloudflare: failed to find TXT records: %v", err)
}
for _, record := range records {
err = d.client.DeleteDNSRecord(zoneID, record.ID)
if err != nil {
log.Printf("cloudflare: failed to delete TXT record: %v", err)
}
}
return nil
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}